Refrigeration – Processes – Circulating external gas
Patent
1996-02-16
1997-08-26
Doerrler, William
Refrigeration
Processes
Circulating external gas
62271, 165 7, F25D 1708
Patent
active
056600488
ABSTRACT:
A method of conditioning a process stream of air in an air conditioning system wherein a process stream of air is dehumidified and cooled to provide a conditioned stream of air for introducing to a conditioned space, the method comprises the steps of providing an enthalpy wheel comprised of an adsorbent contained in a paper web, the enthalpy wheel having a multiplicity of passages through which the process air can flow, the enthalpy wheel capable of regeneration by passing an air stream therethrough having a temperature and humidity lower than the process air. In the method, process air is passed through the enthalpy wheel to remove heat and moisture therefrom, and the enthalpy wheel is regenerated by passing air therethrough to remove heat and moisture therefrom. Thereafter, the method includes providing an adsorption wheel having a multiplicity of passages through which the process air from the enthalpy wheel can flow for adsorbing moisture, the wheel capable of adsorption of moisture from the process air and of regeneration. Process air from the enthalpy wheel is passed through the adsorption wheel to remove moisture, and the adsorption wheel is regenerated by passing hot gases therethrough to remove moisture. After passing through the adsorption wheel, process air is introduced to an indirect evaporative cooler having a dry channel and a wet channel separated by a moisture-impervious wall wherein heat is extracted from the dry channel through the wall to the wet channel, the process air from the adsorption wheel being introduced to the dry channel to provide cooled process air exiting the indirect evaporative cooler to provide a cooled stream of air having a controlled level of humidity. Air is directed to the wet channel of the indirect evaporative cooler, the air directed to the wet channel being selected from at least one of outside air, air returned from the conditioned space, a portion of the air from the enthalpy wheel, and a portion of the cooled air exiting the dry side of the indirect evaporative cooler.
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Belding William A.
Holeman William D.
Janke Scott L.
Lam Chiang
ACMA Limited
Alexander Andrew
Doerrler William
Laroche Industries, Inc.
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